Oil-stove.



F. E. WHITE & F. E. HOOPER. OIL STOVE.

APPLICATION FILED JUNE 30. I917.

1,290,856. Patented Jan. 7,1919.

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FRED E. WHITE AND FREDERICK E. HOOPER,

GAS STOVECOMPANY, OF

0F GARDNER, MASSACHUSETTS, ASSIGN- GARDNER, MASSACHUSETTS.

OIL-STOVE.

Specification of Letters Patent.

Patented J an. 7, 1919.

Application filed June 30, 1917. Serial No. 177,892.

To all whom it may concern:

Be it known thatwe, FRED E. WHITE and FREDERICK E. HOOPER, citizens of the United States, and residents of Gardner, Massachusetts, have invented certain new and useful Improvements in Oil-Stoves, of which the following is a specification.

Our invention relates to oil burners and is designed to improve the jacket utilized with what are known as blue flame oil stoves.

As is well known an oil bowl is utilized in this class of stoves with a maintained oil level from a reservoir and surmounting the burner are combustion tubes of perforated metal, while around these combustion tubes to protect the flame from drafts a jacket is usually provided.

We have found that to get the best results from an oil burner of this type it is important to have this jacket tapering upwardly the largest diameter being at the bottom and with means for restricting the flow of air, between the jacket and the outer perforated combustion tube. To this end we use a restriction for the current of air at the bottom of the jacket, consisting of a perforated ring and find it necessary that there shall be also a roperly adjusted flow of air in the space etween the jacket and the top of the combustion tube and this we accomplish by drawing in the top of the jacket and flanging it, so as to cause the proper amount of flow of air between the overhang ing edge of the jacket and the combustion tubes. This construction tends to retard the passage of air and gives just the results sought for.

In the accompanying drawing;

Figure 1 shows a section through the combustion tubes and jacket.

Fig. 2 is a detail showing how the lower perforated ring is inserted.

Fig. 3 is a fragmental bottom plan view showing the ring being threaded into place.

We have found by careful experiment that the very best results can be secured in a burner of the type specified, if the amount of air around the combustion tubes can be controlled and re ulated and particularly is this true in large burners, such as the twelve inch size.

In carrymg out our invention we utilize the ordinary concentric tubes at, b, whlch are supported in relation to the burner bowl (not shown). In order to protect the flame from drafts and currents of air which seriously interfere with proper combustion we provide a jacket (11 of sheet metal, this jacket tapering with its larger end at the bottom. The jacket is suitably supported by rods passing through the jacket and combustion tubes as shown at e. We restrict the bottom of the jacket by interposing a perforated ring f in the space between the jacket and the outer combustion tube, this ring being supported by an inturned flange 9. We prefer to make this ring in onepiece stamped out and in order to get it readily into place we cut a slot h in the flange and edge of the jacket and a corre sponding slot 2' in the and by bringing these slots together we thread the ring into place above the flange. The ring has an upwardly turned flange j at its center edge.

We have also found that we get improved results by drawing in the edge of the jacket at the top to form a flange is, this flange reducing the space between the jacket and the outer combustion tube, and we also extend the jacket above the top of the outer combustion tube. This gives the necessa regulation of air and not only protects the combustion tubes from the varying currents to prevent red and streaky flames but gives just the proper adjustment and space for the upward flow of air within the jacket and between it and the combustion tubes as to give the very best results in combustion and heat.

We also find that the best results are secured by making the jacket with approximately an inside diameter at its upper end of five and one-fourth inches with the plane of its upper end substantially seven-sixteenths of an inch above the top of the outer combustion tube, the space between the jacket and the circumference of the outer combustion tube being about five eighths of an inch and the space at the bottom between the outer combustion tube and the jacket being substantially one inch.

Any material variation in these dimensions causes imperfect combustion and lessens the heating quality of the flame.

at we claim is: In combination with concentric combusperiphery of the ring tion tubes and a protecting j acket, the jacket the slot in the ring together and then threadbelng provided with at slot in its edge, a pering the ring into place above the flange of toreterl ring closing the space between the the acket, substantially as described. 10 lower end of the jacket and the outer corn- In testimony whereof We affix our signa- 5 bustion tube, said ring having aslot in its tures.

periphery and adapted to be inserted into FRED E. WHITE.

place by bringing the slot in the jacket and FREDERICK E. HOOPER.

Copies of this patent may be obtained for five cents each, by eddreeaing the Commissioner a: new, Washington, .0. 

